Related Information

Zinc pyrithione (also known as Zinc Omadine® or Zinc 2-pyridinethiol-1-oxide) is used to prevent microbial degradation and deterioration of manufacturing starting materials such as plastics, polymers, and latexes, and in a wide range of finished articles made from these starting materials. The chemical acts to prevent the growth of bacteria, fungi, mildew, and algae that can cause various types of deterioration such as discoloration, staining, odors, etc.

Zinc pyrithione is also registered for incorporation into antifoulant boat paints to control the growth of slime, algae, and marine fouling organisms (e.g., barnacles, tubeworms, etc.) below the water line on recreational and commercial boat hulls.

The largest use for zinc pyrithione is non-pesticidal (i.e., control of dandruff, seborrheic dermatitis, and psoriasis), and is regulated by the Food and Drug Administration. It is the active ingredient in many anti-dandruff shampoo.

How is zinc pyrithione formulated and incorporated?

Zinc pyrithione is incorporated into various polymers and plastics as a liquid, powder, or aqueous dispersion, during the manufacturing process of these materials, and during the manufacture of finished articles from these materials. Zinc pyrithione is added usually by metering pump if it is a liquid, and by open pouring if it is the powder form. It is added at a point where thorough mixing will take place.